Abstract

Eyrei (Castanopsis eyrei) is of subtropical evergreen broad-leaved forest in one of the main constructive species . Object of this paper is Ningguo Banqiao Nature Reserve eyrei secondary forests , the use of ecological principles , quantitative analysis methods, and EXCEL, SPSS, MATLAB, MAPINFO other software and computer simulation technology eyrei forest community structure and characteristics , species diversity, species - area relationship , population development and changes in the law , eyrei population distribution pattern of association between the dominant species , eyrei intraspecific and interspecific competition were studied. The results show that : 1. Banqiao Nature Reserve eyrei community is eyrei , brown leaf beech , pine and ovatum as the dominant species of evergreen and deciduous forest , currently eyrei stable population growth is still in its dominant species in a given period will not be replaced by another species . However, due to the lack of seedling grade Ⅰ and community natural succession , probably eyrei into recession by the stable population model , and gradually replaced by other dominant species . 2 eyrei overall diversity of forest communities in the middle level . Species - area relationship study found that the number of the species with the plot area changes with power function : y = 0.3338x 0.5881 sup> Fit kind - area curve best. 3 eyrei population distribution in various places most of the cluster distribution , along with the increase in population age and size class increases, the distribution pattern of the cluster distribution becomes random. This may be caused due to competition . 4 eyrei forest community overall association showed no significant negative association of all kinds on the 50% showed no link , are binding species on the number of slightly more than negative association kind of right quantity, but only a few species pairs there were significant association . 5 eyrei and other dominant species in the competition, is dominated by a period of time will remain stable. With the objects of wood competitive intensity decreases with an increase diameter class and becoming more stable. Eyrei and stand within species , other species, other dominant species , brown beech leaves the competition between the index and the diameter class eyrei quantitative relationship between the inverse function models are available : CI = AB / S to fit , and the effect is very good.